Main Street Bridge (US 45) - Oshkosh

Main Street Bridge (B-70-56) over the Fox River and approaches in the city of Oshkosh in Winnebago County


The Wisconsin Department of Transportation (WisDOT) Northeast Region announces a live, online public involvement meeting (PIM) for proposed improvements to the Main Street Bridge (US 45) over the Fox River in the city of Oshkosh, Winnebago County. This meeting will be held via Microsoft Teams and accessed via the link below.

Project engineers will share maps, displays, and exhibits via a live presentation. Information for businesses impacted by road construction will also be included in the presentation. A comment, question, and answer period will follow the live presentation. You can also listen to the project presentation via audio-only on a calling device if you prefer.

Main Street Bridge (US 45) Live, Online Public Involvement Meeting

  • When: 5 p.m., Thursday, February 29, 2024
  • For live video and audio: Access the meeting via computer or mobile device by going to the Main Street Bridge Project design website and clicking the link at the top of the page at the time of the meeting.
  • For audio-only: Call into the meeting via phone. You will hear the presentation and be able to ask questions.
    • Conference Call Number: (608) 571-2209, Phone Conference ID: 639 373 228#

The Wisconsin Department of Transportation (WisDOT) is in the process of developing plans for proposed improvements on the Main Street Bridge on US 45 over the Fox River in the city of Oshkosh, Winnebago County. The purpose of this website is to provide information regarding the proposed improvements, describe the potential impacts it would have on the community, and offer an opportunity for public comment.

Project location

The Main Street Bridge (B-70-56) over the Fox River and approaches, the city of Oshkosh, Winnebago County.

Main Street Bridge (B-70-56) over the Fox River and approaches in the city of Oshkosh in Winnebago County 

Project purpose and need

The structure is safe for vehicle and pedestrian crossing. The purpose of the project is to preserve the operation of the structural, mechanical, and electrical components of the US 45 Main Street Bridge.

The existing structure and its mechanical and electrical elements have received various repairs and maintenance over its lifespan, but the structure has become deficient due to varying levels of deterioration. Many of the elements are deteriorated or have exhausted their useful service life. These include structural, mechanical, hydraulic, and electrical components.

structural, mechanical, hydraulic , and electrical deterioration on bridge components structural, mechanical, hydraulic , and electrical deterioration on bridge components

Anticipated Benefits

The following anticipated benefits are expected following the project’s completion:

  • Decreased maintenance costs associated with the structure
  • Improved operation of the movable span
  • Extending the life of the existing structure by replacing deteriorated and worn-out components

Proposed improvements

Proposed improvements include:

  • Rehabilitate existing electrical, mechanical, hydraulic, and structural components of the bascule span
  • Minor repairs to the operator’s house and access platforms
  • Scarification (removal) and overlay of the approach span concrete deck
  • Removal and replacement of the steel grid deck on the movable span.

Traffic impacts

The bridge will be CLOSED during construction

  • Vehicle detour: The detour is shown as the solid orange line in the image below and utilizes 9th Avenue, Oregon Street, and Jackson Street.
  • Pedestrian detour: Uses sidewalks along 6th Avenue, Oregon Street, Jackson Street, Division Street, Pearl Avenue, and Main Street.


The final design is expected in 2024. Construction will begin in the fall of 2025 and conclude in the spring of 2026

schedule graphic: inal Design: 2024 • Construction currently scheduled in Fall 2025 – Spring 2026  

Real estate

No real estate is required for this project.

Business Resource: WisDOT’s In This Together program

Business coordination guide graphicWisDOT recognizes businesses located in work zones or impacted by detour routes have special needs. WisDOT's In This Together program is offered to businesses, organizations, and community leaders as an idea source as they plan for road construction in their area. It includes promotional examples, case studies, and a specially designed Business Coordination Guide with information on:

  • Planning ahead
  • Staying informed
  • Keeping customers informed
  • Tips for businesses

Temporary business signing

Please see the In This Together website for information on temporary business signing during closures and detours. Businesses impacted will have an opportunity for temporary business signage during construction.

Public input/comments

Your comments assist us in developing a project that will serve the needs of the traveling public

as well as the needs of the local community and are welcomed and appreciated throughout the design process.

Please submit comments to WisDOT using one of the following methods so that we receive them by the comment date to be considered during design.

  1. Fill out the comment form attached to the Main Street Bridge Project Handout and mail it to WisDOT.
  2. Email comments or questions to the contact listed below.
  3. Call the contact below.

Project contact

Bill Bertrand, P.E., WisDOT Project Manager
Wisconsin Department of Transportation
944 Vanderperren Way
Green Bay, WI 54304
Phone: (920) 360-3124